One of the stranger concepts
from Dylan Thomas
' play Under Milk Wood
. The character who requests this is a womaniser
, and the request is made in the morning.
with an egg
My English teacher
suggested that the egg is used here as a symbol of virility
, the same person asks for a "pint of stout... no egg" towards the end of the play. I recall he had reason not to feel particularly virile at that point in the plotline.